Dr Li Gang (UniSQ) - Listening to stars: An introduction to Asteroseismology скачать в хорошем качестве

Dr Li Gang (UniSQ) - Listening to stars: An introduction to Asteroseismology

Seminar 18 March 2026 Dr Li Gang is an ARC DECRA Fellow at UniSQ Centre for Astrophysics. He obtained his PhD at the University of Sydney in 2020. He is most well known for his work using stellar oscillations to measure stellar properties, specifically internal magnetic fields, rotation, and tidal interactions. Title: Listening to the Stars: An Introduction to Asteroseismology. Abstract: For a long time, our understanding of stars has relied primarily on their observable surface properties, such as luminosity and colour. Combined with information from binary systems or stellar evolution models, these measurements allow us to infer fundamental stellar parameters such as mass and age. However, the physical processes occurring deep inside stars can only be indirectly inferred from these surface observables, leaving significant uncertainties. In this talk, I will introduce a new approach to studying stars. This method observes waves that propagate inside stars and uses their frequencies and other properties to probe stellar interiors and the physical processes occurring within them. This technique is analogous to using seismic waves to study the interior structure of the Earth, and is therefore known as asteroseismology. I will introduce the basic concepts of asteroseismology and review the rapid progress of this field following the launch of the Kepler mission. In particular, I will highlight recent breakthroughs enabled by asteroseismology, including measurements of internal stellar rotation, improved constraints on stellar ages, and the discovery of strong magnetic fields in the cores of stars.